July 25 (Reuters) - Shares of Rentokil Initial ( RTO )

slumped nearly 7% on Thursday after the British pest control

company said its annual organic revenue growth for its North

American segment would come in at the lower-end of its forecast.

In March, the London-listed company forecast its full-year

organic revenue to grow within the range of 2% to 4% for its

North American business.

The company also posted on Thursday a 1.5% organic revenue

growth for its North American pest control category in the

second quarter, compared with a 1% growth in the prior quarter.

"Investors are ostensibly reacting to the muted

quarter-on-quarter improvement in organic growth for the

beleaguered North America pest control business," said Grant

Slader, analyst, Morningstar.

Peer Rollins posted a 7.7% organic revenue growth in

the second quarter, helped by steady demand for its pest control

services in the United States.